Machine for operating upon lasts



1929. A. F. PYM

MACHINE FOR OPERATING UPON LASTS Filed March 11, 1925 4 Sheets-$heet Aug. 6, 1929. PYM

MACHINE FOR OPERATING UPON LASTS 4 Sheets-Sheet 2 Filed March 11, 1925 Aug. 6, 1929.- PYM MACHINE FOR OPERATING UPON LASTS 4 Sheets-Sheet 3 Filed March 11, 1925 Ava/70k?- i M 9W Aug. 6, 1929. A. F. PYM

MACHINE FOR OPERATING uPon' LASTHS Filed March 11, 1925 4 Sheets-Sheet 4 &

q m (T Patented Aug. 6, 1929.

UNITED STATES I 1,723,3e1 PATENT OFFICE.

ARTHUR F. PYM, OF MARBLEHEAD, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEN JERSEY.

MACHINE FOR OPERATING UPON LASTS.

Application filed, March 11,1825. Serial No. 14,756.

This invention relates primarily to ma are disclosed methods and machines relating to the lasting of the toe oi a shoe, a characteristic of which is that a last, an. insole and a lasting machine are each provided with a positioning surface, or with a plurality of positioning surfaces in spaced locations, preferably provided by positioning holes, by the use of which the last and the shoe upper materials, which are to be shaped thereon, may be positioned quickly and accurately in relation to the lasting devices.

One important object of the present invention is to provide a machine particularly adapted to formone or more positioning holes in the bottom of a last. A further object of the invention is to provide a ma chine for inserting metallic bushings in such holes. So far as applicant is aware, any machine adapted to perform these operations is new in the art. I 4

lVith these and other objects in view, the preferredembodiment of the invention herein illustrated comprises the combination of a plurality of gages constructed and arranged to engage a last and thereby to determine its position in all directions, a plurality of drills for forming'holes of predetermined depth in the bottom of the fore part of the last in predetermined relation to its edge contour and at a predetermined angle to the general plane of the bottom of said fm'epart, and also a plurality of tools for inserting bushings in the holes formed and pressing the bushings into contact with the bottoms of such holes.

In the particular embodiment of the invention herein illustrated, the machine is constructed and arranged to form three positioning holes in predetermined, spaced relation to each othc' and to the contour of the last and then to insert a metallic bushing in each of said holes, the machine being thus adapted for use in carrying out the method [claimed in application Serial No. 8,717

above referred to but it is within the scope of this invention to form one such hole only in each last, as is contemplated in the earlier application, Serial No. 698,099, also referred to above. Moreover, the invention, in various aspects, .is not limited to embodiment in machines of the type herein illustrated, by

way of example, or to machines for performing the operations for which the illustrated machine has been especially designed.

The invention comprises also various other combinations and arrangements of parts, as well as particular features of construction, which will now be described in detail in connection with the accompanying drawings which illustrate a preferred embodiment of the invention.

In the drawings:

Fig. 1 an end elevation of the machine with a portion of the frame broken away to show the parts behind it;

i Fig. 2 is a side elevation with certain parts broken away and with a last shown in sec tion; a

Fig. 3is a sectional plan substantially on the line IlI-III of Fig. 2 but with the clamp which engages the top of the last omitted;

Fig. 4. is a plan view of the two swinging tool carriers with certain parts broken away and others shown in section;

ig. 5 is an elevation partly in section of the bushing inserting mechanism, and

Figs. 6 to 9, inclusive, show details of construction hereinafter fully described.

' Figs. 1 and 2 are on a slightly smaller scale than the other figures.

In the drawings, lOdesignates the main frame or base ofthe machine, upon which rests a table 12 which carries the work gag; ing and supporting devices and which is movable about a horizontal rod 14 so that the table and its associated parts may be raised bodily about the rod as a fulcrum to renderthe parts beneath readily accessible. A pair of pivotally connected links 15 limit such movement of the table. Secured to the table is a bracket 16 in which are mounted certain last clamping devices to be described below. Set into a recess in the table over the bushing inserting tools, when they oc-- a removable plate 18 in which are three holes 20, the plate being held in place in the table by t vo latches 22. Similarly, over the drills, when they occupy the position shown in Figs. 2 and d, is set, in a recess in the table 12, a removable plate 24 also having fined therein three bushings 26 and being secured firmly in position against movement either vertically or laterally by three clamps 28. These plates 18 and 2d are made readily removable in order that they may be replaced by similar plates in w iich the hole and the bushings 26 respectively are di'l'l erently spaced, as will be hereinafter explained.

L designates a last in the bottom of which positioning holes H are drilled by the present machine for the reception of metallic bushings B. It will be noted that the bottom of the :torepart or this last is somewhat convex both longitudinally and laterally and, in order to position the last for these operations, gages are provided which engage both the bottom face of the last and also the surface of the last adjacent to its bottom in advance of the greatest transverse dimension of the last. These gages include a toe gage secured to the table 12 and provided not only with a surface 34c to engage the bottom of the last adjacent to the toe but also with a slightly inclined surface 36 to engage the side of the last, as shown particularly in Fi 5. The last positioning means includes also two pairs of side gages 38 and 4:0 (Fi 3), in the form of levers, of which the pair 38 have, at their last engaging ends, two surfaces l2 and i l similar to the surfaces 34.- and 36 which engage respectively the bottom and the o iposite sides of the last at substantial, and at approximately equal, distances from the toe gage. The gages, e0, engage the sides, but not the bottom, of the lastalso at subt-santially ecaal distances from the toe gage but nearer thereto than the gages 38 measured longitudinally of the last. These gages 38 are pivotec to the table 12 at 18 and are connected by tension spring which tends to maintain the rear ends 52 of the gage levers in contact with a wedge block 5% secured to a slide 58 in an undercut guideway 58 in the table 12, as

shown in Fig. 8. The gages 40 are likewise held by a spring 60 outwardly so that rolls 62 mounted on the respective gages are maintained in engagement with tapering surfaces 6 of a block 65 secured to a slide 66 in another guideway 67 in the table 12. The two slides 56, G6 are connected by a comparatively h avy spring 68 which, when permitted so to do, draws them and the wedge blocks 5%, toward each other against the resistance of the lighter springs 50 and so that the last engaging ends or the gage levers 38. 40 it apart.

The innermost positions of: these at their minimum distances ends are determined by the adjustment of screws 72 (Fig. l) threaded througl the table, one for each pair of side gages. These screws respectively engage a pair of levers 7% fixed to rock shafts 46 in brackets '78 depending irom Another pair of levers 79 also tired to aid shafts bear against surfaces 80, 82 forming parts of the slide: 56, 66 respectively.

-hus by indepenr ent preliminary adjustment of the two screws 72, the innermost posinons ot the ends of each pair 0t side gage site sides or and locating it in a predetermined posi tionangularly, longitudinally and laterally in the general plane of the bottom of the last. the 5513118 time, the operator also surfaces 3%, 42 so as to To prevent any displacement of th rmined position while nd while it is be 1 is provided b undercutting the which the corresponr 66 move, and y plunges 8o 1 cally in the table and actuated t slides 56, 66 in their guideways togg es 92, the lower end of each ojt' pivoted to a bracket 9% depending from is r These toggles and the ph 88 are L connected to an equalizing lever 96 in turn 98 secured w ch in turn z conrected by a link 97 to 2. arm

L to a reel; shat 0O 3) mounteu in bearings ot a cured to the table 12. A her win l to the rock shaft 1 hated throi 5h contact with a collar 10o loosely surron ng a rod 108 to whch is tired a collar lid, a compression spring 112 being interon between the two collars. The rod 103 y cennerfed to the lower end of a r ill novable in a guideway in a block bolted to the bracket it. This rack actuates a pinion 118 pinned to a short shatt 120 carried by the bracket and hav' i0 secured to t a bevel 122 which meshes to the lower end of the rod is an abutment member 128 having a stab point 130 adapted to penetratethe upper surface of the toe portion of the last.

er the last has been located in predetermined position upon and against the gages 32, 38 and l in the manner above described, the abutment member 128 being then above its last clampingposition shown in the drawings, the rod 108 is moved up wardly by mechanism about to be described so that the plungers 88 clamp the slides 56, 66 and thereby the side gages 38, 40 in their last engagingposition, after which, through the continued upward movement of the rod 108 which is permittedby the compression of spring 112, the abutment member 128 is brought into contact with the fore'part of the last, the stab point 130 penetrating the wood of the last so that the latter is clamped firmly in the position determined by the gages.

The said rod 108 is actuated in opposite directions by two treadles and connected mechanisms which will now be described. The rod is connected to a lever 131 by means, especially illustrated in F 6 and 7, so arrai'iged that the operator may readily disconnect the rod from the lever to enable the table 12 and the parts carried thereby, including the rod 108, to be raised, as above explained. This connecting means is provided by extending the lower end of the rod 108 between the forks 132 at one end of the lever 131, one of the forks of which is provided with a laterally extending boss 138. Passing through alined holes 13-1 and 135 respectively in the forl s132 in the lower end of the rod 108 is a slidable pin 136 pro vided with a finger piece 138. \Vithin a central blind hole 14l0in the pin is a compression spring 1 12 l)0tt1'l11g against the bottom wall of the hole and also against a. plate 141% secured to the end of the boss 133 by two screws The linger piece 188 slides in a slot 1418 in the boss 188 which is provided with a shoulder 150. Normally, spring 1-1- maintains the pin 136 in the holes 184., 185, as shown in Fig. 6. hen it is desired to discoi'inec" the rod 168 from the lever 131, the pin 136 is retracted and turned slightly about its axis and then held in such retracted position by engagen'ient ol' the finger piece 138 withthe shoulder 150.

The lever 131 pivoted at 156 to a block on a rod 204 further to be described and the rear end of the lever is connected. by a rod 158 to the rcar end of a treaille i 61) through the actuation of which the rod. 168 is dopressed whereby the nut 125 is turned to raise the abutment 128 and thus to'unclamp the last. The rod 108 is raised and the nut 125 is turned in the opposite direction to clamp the last through another treadle 162 connected by a rod 161 to the lever 131 at adjacent to the removable pin 136. The pitch of the thread upon the nut 125 and upon the rod 126 is relatively small so that the nut and screw are self-locking both in last clamping and also in last releasing positions.

The mounting of the tools, which include three drills 1'70 and three bushing inserting tools 172, and the mechanisms by which these tools are actuated will now be described. These drills are caused to bore three parallel holes H (Fig. extending from the bottom fate of the last L at a predetermined angle to thegcnenl plane of the forcpart of the bottom of the last and then three metallic bushings B are forced to the bottoms of the holes so bored. Preferably these bushings are of slightly larger diameter than the holes so that they will be eii'ectively retained in the last by friction after they have been forced into the holes. The general plane just referred to may be regarded as that above referred to, it is importantthat the bottoms of the holes I-I shall be located at definite, predetermined distances from this plane, Conveniently and as herein shown, the bottoms of all oi. the holes are at equal distances from this plane.

Furthermore, while it is conten'iplated that the holes will be located in the same relation to the edge contour of the lastbottom and to each other in all lasts of the same size and style, and also that holes having the same relative spacing and arrangement may be employed in a substantial range of lasts of different and styles, yet it also contemplated that it will be desiraliile to have a greater spacingfor the holes in a relatively large lastthan in a small last,

and also that different spacings may be desired even for lasts of the same nominal size which are used for different types of shoes, surh as welt and Mcl'iay shoes. Ac-

cordingly, provision made, in the illus-.

tratedmachine, for varying the relative siacing both of the drills 170 and of the bushing inserting members 172, as will later be explained.

Moreover, as is also pointed outin the companion application just mentioned andv as shown in Fig. 5 of tl'iedrawings of the present case, the bushings 1% are provided with blind holes k and, in order to carry out the method claimed in said companion application, it is important hat the bottoms of these holes H shall be ata predetermined distance from the imperforate ends of the bushings B, said ends being located at a predetermined distance from the plane P, as above stated. Accordingy, in the use of the present machine, the holes H having been bored to a predetermined depth,the bushings 13 are forced into these holes with their ends engaging the bottoms of the holes. Preferably, therefore, the bushings B wil be of such length that, after they have been seated in the holes H, their outer ends may be ground oft" flush with the bottom surface of the last.

The two sets of tools 170 and 17 2 are preterably carried on two laterally swinging carriers so that they may be swung al rnately into precisely the correct operative position, shown in the middle of Fig. 2, immediately below the torepart of the last L after the latter has been accurately positioned in the machine in the manner already described.

The drills 1'70 are provided near their lower ends with enlarged portions havii ff flattened surfaces 173 and shoulders 17% resting on loose washers 176 and their lower ends are internally threaded, respectively fitting the threaded upper ends or short vertical shafts 178 (Fig. 2) having shoulders against which the washers 176 are clamped as the drills are screwed on. The shafts are jour ialed in a block 180 which is removably secured by screws 181 to the upper end of a vertically slidable sleeve 182 and each shaft 178 is connected to another similar shaft 18%, journaled in the lower portion of the sleeve 182, by universal joints and an ere tensible member, indicated at 186, which provides. for the proper driving of the three halts 1T8 even when their spacing from each other is varied according to the different spacings desired for the holes 1-1 in the last L, as above desc ibed. The three shafts 18 respectively carry three gears 188 which mesh with a vertically stationary gear 190 having a relatively wide face to provide for the proper driving of the gears 188 during their vertical movement with the drills. The gear 190 is mounted on a shaft 192 constituting the rotor of an electric motor indicated at 19s. The shaft 192 also carries atan 196 by which chips produced during the boring of the holes 1 in the last and dropping into a fan chamber 198 are zrp'elled through an exit opening 200. The housing of the motor is firmly secured to a swin ing frame or tool carrier 202 which is piv d to swing in a horizontal plane upon a tulcrum rod secured in bearings 206, 208 carried by the frame 10. The sleeve 1.82 and the drills 1T0 carried thereby may be moved vertica ly by the operator through a bifurcated lever 210 pivoted at 212 to the frame 202 and having an operating handle 21.4. This lever is connected by links 216 to studs 218 screwed into opposite sides of the sleeve 182.

To guide the drills and to restrain them against lateral springing, guide bushings 220 are provided which are'fixed in a plate 221 that is removably secured in the upper end of another vertically slidable sleeve 222. Flanges 223 integral with the bushings 220 bear firmly against the plate 221 and, by coming into engagement with the lower ends of the larger bushings 26 in the removable plate 24, definitely limit the upward move ment of the sleeve 222- and the parts car 'ied thereby in which position the bushings 220 are preferably substantially flush with the upper ends of bushings 26 so that, whatever the convexity of the last bottom, the ends of bushings 220 will not contact with it. The plate 221 rests upon an annular ledge 226 at the bottom of a recess in the upper end of sleeve 222 and is held against rotation therein by key 22d (Fig. d). Two spring pressed pins 225 entering slots 22? in tne edge of the plate normally retain the plate in the recess and against the ledge but these pins may be retracted to permit removal of the plate 221, as for example, when it is desired to substitute a plate with bushings 20 differently spaced according to a. different spacing of the holes H in the last. The sleeve 222 and the bushings 220 carried thereby are normally pressed upwardly by two compression springs 230, their upward movement being normally limited by two latches 232 pivoted upon opposite sides of tl e sleeve 222 and normally held by springs 283 in engagement with lugs 23 1 projecting from the sleeve, only one such latch and one such lug being visible in Fig. 1. The studs 218 are slidable vertically in and .it the walls of slots 239 in sleeve 222 and also of slots 240 in a vertically fixed sleeve 2&2 which lits and guides both sleeves 182 and 222 and forms a part of the housing of the motor 194-. Accordingly, the studs 21S and the sleeve 242 maintain both of the movable sleeves 182 and 222 in a fixed angular relation with respect to the supporting frame 202.

With this construction, the drills 170 being rotated at high speed by the motor 194-, the operator grasps the handle 21st and raises the drills from the position indicated in Fig. 1. During the first part of this upward movement, the sleeve 222 moves with the drills and carries the guide bushings 220 into the bushings 26, in plate 2% of the table 12, in which they have an easy sliding lit. These bushings 26, therefore, serve as guideways for the guide bushings 220. As soon as the bushings 220 have fully entered bush- 26 and continued lifting pre ings 26, any further movement of the bushings 220 and of the sleeve 222 is prevented by engagement of flanges 223 with bushings are by the operator upon the handle causes the drills to bore the holes H in the last. The depth to which the drills penetrate the last is accurately determined by the adjustment of a screw 243 threaded into the top of block 180 and held in adjusted position by a lock nut 24.4. The distance which the ends of the drills 170 may move upwardly beyond bushings 220 is limited by the contact of the head of screw with the lower surface 247 of the plate 221. Hence, since the distance of the bottom of the last from the upper suri'aces ol. the table 12, plate 2% and bushings 26-all or which SUIIEZICOS lie in the same horizontal planeis definitely determined by the gage surfaces 3%, 42 and since the ends of the drills 170 in their highest positions are likewise at definite distances from the same surfaces. the depths of the holes H termed by the drills are accurately predetermined.

The operator, by taking hold oil? a hand piece 2% connec ed with the latches 2212 and by moinentarily depressing the sleeve 222 against the resistance of springs 230, may then swing the latches to the right, shown in Fig. 1, disconnecting them irom the studs 218 and he may then allow the springs to move sleeve 222 relatively to sleeve 182 so that the dri is 17 0 are withdrawn from the bushings 220 and so that accumulated chips may be cleared a *ay from the drills and bushin s.

Referring now in detail to the meclmnism for inserting the bushings B in the holes H which have been bored by the drills 170, each tool 172, as shown more particularly in Figs. 2 and 5, comprises a vertically projecting pin 250 having at its base a shoulder 252 which supports a bushing B which has been placed over the pin by'hand or in any convenientn'ianner when the tools 172 are in their uppermost position about to be described. The middle portion 254-1 of each tool 172 is at the inner wall of the corresponding washer 26 in. the plate 24-. Each tool is provided with a shoulder 256 near its lower end to rest upon a block 258 into which a threaded portion 260 or the tool 172 is screwed. From the block 258 depencs a sleeve 262 which is removably secured, as by a set screw 208,320 the upper reduced end 26%- of a rod 268. The. lower portion 270 o'f this rod 268 also has a reduced diameter, thus forming a shoulder 272 which rests upon the upper end of another vertical rod 27 i which tits over the portion 270 of rod 268 and is rotatable and slidable in lugs 276 of a swii ging frame 278 which may turn upon a fixed rod .280 mounted in the frame 10 of the machine.

such diameter as to lit easily In its lowermost position, the block 258 rests upon the upper end of the frame 278 but it is vertically movable and rotatable in the frame. Clamped to the upper end of the rod 274 by a belt 281 is a collar 282 while another collar 28% is clamped by a bolt 285 to the rod 268. A toggle 286 is pivoted at its upper and lower ends respectively to the collars 282, 28-1, being provided with a handle 288 by the actuation of which the operator may raise the block 258 and the bushing inserting tools 172 carried thereby to force the bushings B through the bushings 26 and into the holes H in the bottom of the last.

A relatively strong spring 290 connecting the two collars 282, 284 sustains the weight of rod'274 and normally maintains the toggle in the position shown in Fig. 5. A link 202 connecting collar 282 with a fixed collar 29 1- on the fixed rod 280, with the frame 278, constitutes a parallel motion" which, since rod 268 is keyed to both sleeve 262 and rod 274, maintains these parts and the parts carried thereby, including handle 288, always in the same angular relation to the machine frame, whatever the position of I the swinging frame 278, and thus insures the proper angular relation between the tools 172 and both the holes 20 and the bushings 26. lVhile the spring 290 is strong enough to sustain. the rod 274 and its connected parts when the block 258 is in its lowermost position shown in Fig. 5, a support is provided for the lower end of the rod 274s in each of its two working positions. As shown particularly in Fig. 2, the lower part of the frame 10 of the machine includes two beams 290 into which are threaded two bolts 298 having fiat heads 300 and lock nuts 302. These bolts are located immediately beneath he rod 27% in its respective positions and are so adjusted that they are in contact, or just barely out of Contact, with the lower end of the rod in such positions. Hence, when the frames 202-, 278 are swung to the left as shown .in F 2 and 4: to bring the tools 172 beneath the last as shown in. Fig. 5, the rod 27 lwill be immediately above that one of the bolts 298 which is shown at the left in Fig. 2 and which will sustain the rod during the relatively heavy pressure exerted thereon during the insertion of the bushings B. Clamps 808 may be provided also, as shown in Fig. 8, to hold table 12 down to the base 10 during this operation.

To sure further that the drills 170 and the busln 220, when in their operative posi ions (Fig. 4), shall be in axial alinenient with the bushmgs 26, the swinging frame 202 is provided with an extension 310 through a lug of which is threaded a stop screw 812 which will be so adjusted that, when its end comes into engagement with the vertical rod 280. the drills 170 will be in exact alinement with the bushings 26. Similarly the swing frame 278 is provided with two lugs 814: through which are threaded adjustable screws 316 which come into engagement with parts of the frame 10 of the machine and thus insure that the inserting tools 172 shall accurately aline alternately with the holes 20 and with the bushings 26. v

The manner in which the illustrated machine may be operated to form positioning holes H in the bottom face of a last L and to insert bushings B in those holes has been indicated in connection with the foregoing detailed description but it will now be summarized. Most of the parts of the machine 'eing in the positions indicated in Figs. 1, 2 and 4 but with the last and the bushings not yet placed in the machine, with the last clamping abutment 128' in its uppermost position and with the side gages 38 and 40 in their innermost positions determined by the adjusting screws 72, theupper portions of the three inserting tools 1 2 are lifted by handle 288 through the holes 20 in the plate 18 and three metallic bushings B are placed over the respective projections 250 and against the shoulders 252 after which the inserting tools are returned to their lowermost positions, Then a last L is placed by the operator with its bottom against the surfaces 42 of the pair of side gages 38 and with the adjacent side portions of the last against the surfaces ll and 46 of both pairs of 38, 40 and then the last is pushed inwardly, forcing the gages 38 and d0 apart and stretching spring 68, until the toe portion of the last has been brought firmly into engagement with both the surfaces 3% and 86 of the toe gage 32. Vhile the last isthus held by the operator in this definite position heightwise relatively to the upper surfaces of table 12 and of plate 2i and also augularly laterally and longitudinally relatively to the bushings 26, as determined by the three gage surfaces contacting with its bottom and the live surfaces contacting with its toe and opposite sides adjacent to its bottom. the treadle 162 is depressed and the movable side gages are thereby irst locked by the plungers 88 and then, through continued movement of the readle the abutment 128 is pressed against the upper portion of the toe of the last, the stab point 130 penetratin the last, so that the last is firmly clamped in said predetermined position.

The motor 19% having been started into operation so that the drills 170 are rotating at high speech the handle 21% is moved upwardly by the operator to raise the inner sleeve 182 whereupon the outer sleeve 222 and the guide bushings 220 rise under the force of springs 230 until the flanges 23 of the bushings 220 come into contact with the lower ends of the bushings 26 at which time the upper ends of the bushings 220 will be substantially flush wit-l1 the upper ends of the bushings 20. Continued upward movement of the handle 21% causes the drills 170 to bore the holes H in the last, the distance to which the drills enter the last and consequently the depth of the holes H being determined by the engagement of the screw 2&3 with the surface 247 of the plate 221. The operator then returns the handle 214c, the drills and the parts movable therewith to their lowermost positions and shifts the swinging frame 202 to the left, as shown in Figs. 2 and 4, and also swings the other swinging frame 278 to the left into the position, determined by the left stop 816, wherein the inserting tools 17 2 are brought into alinement with the bushings and with the holes H already formed in the last, as shown in Fig. The operator then lifts handle 288 straightening the toggle 286 and thus actuates the inserting tools 172 to force the bushings B into the holes l-l until they firmly bottom themselves therein, whereupon the inserting tools are again lowered to the position shown in Fig. 5 and the swinging frames 202, 278 are returned to their initial positions shown in Fig. el. The abutment 128 is then raised and the last released by the actuation of treadle 160 whereupon the last may be removed from the machine and the operation repeated upon another last.

In case it is desired to adjust the machine for operating upon a last in which the holes H are spaced nearer together, further apart or otherwise differently from the spacing for which the machine is then set, the plates 18 and 2st are unclamped from the table 12 and are replaced by similar plates in which the holes 20 and bushings 26 are spaced according to the new spacing of the holes H to be formed in a last. The clamps 308 are released and the pin 136 is retracted from the holes 18% so that the table 12 with the parts carried thereby may be swung about the fulcrum rod 14 and held in raised position ly links 15, leaving the parts below the table readily accessible. The plate 221 carrying the bushings 220 is released by the retraction of the spring pressed pins and removed from the machine. The drills 170 are unscrewed from the upper ends of the driving sha ts 17 8 and the screws holding the block 180 in the sleeve 182 are removed so that this blocl: may be removed from the machine and replaced by a similar block in which the journals for the driving shafts have spacing corresponding to the new spacing for the holes H to which the machine is being adjusted. Because of the universal connections between shafts 178 and 18 1-, the shafts 178 can readily be inserted in their journals in the new block 180 after which the drills 170 are again screwed on to the threaded ends of the shafts 178. A

new plate 221, having bushings 220 fixed therein according to the new spacing of the holes H, is now set in place and secured in the recess in the upper end of theslee e 222 by the spring pressed pins 225 and the key 22 1. The block 258 with its integral sleeve 262 and with inserting tools 172is lifted by handle 28S and, set screw 26?) having been loosened, the block and tools are removed from the machine and are replaced by similar parts in which the tools 172 are arranged according to the new spacing. The table 12 is then lowered and clamped to the base 10, rod 108 is connected by pin 36 to lever 131 and the machine is ready for operation again.

Havin fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A machine for forming in the bottom of a last positioning holes located respectively near the toe and near the opposite sides of the forepart thereof having, in combination, a support, a toe end gage and two pairsof side gages at substantially dil'l erent distances rrom the toe gage measured longitudinally of the last, said gages lJGlZlQClll'- ried by said support'and being constructed and arranged to engage the bottom and sides of the :torepart of a last in advance of its greatest transverse dimension and to locate it in predetermined position longitudinally, laterally and angularly relatively to said support both in the general plane of the bottom of the last and also in a direction transversely to said plane, a plurality of drills located in predetermined relation to said gages, and means for actuating the drills to iorm holes in the bottom of the last.

2. In a machine for operating on lasts, the combination of a single gage support, an end gage and a plurality of pivoted side gages carried by said support and constructed and arranged to engage a last both at. three separated points in its bottom and also at one end and at two separated points longitudinally of each side of the last in ad Vance ot' its'greatest transverse dimension, yielding means tending constantly to press opposite side gages toward each other, means for adjustably determining the initial position of said side gages, and a drill located in predetermined relation to said gages and movable toward and from said support for forming a positioning hole in the bottom of the last in predetermined relation to its edge contour and at a predetermined angle to the general plane of the bottom oi the last.

7 3. In a machine for operating on lasts, the combination oil a fixed toe gage and a pinrality of spring pressed side gages constructed and arranged to engage the bottom and the side edges of the forepart of a last nearits bottom and at separated points longitudinally thereof to locate the last in predetermined position in the general plane of the bottom oi the last and also angularly relatively to that plane, means for locking said side gages in last-engaging position, a clamp en 'aging the curved surface of said torepart ror securing the last-in the position determined by said gages and a plurality of C I tools constructed and arranged to operate in predetermined locations upon the bottom of the torepart of the last while the latter is so sequent shoe-making operation, the combi nation of a support, a fixed toe gage and two pairs of connected, inwardly s1')ring-presscd, side gages located'at substantially different distances from the toe gage, the toe gage and those of the two side gages which are located farthest from the toe gage having su faces to engage both the bottom and the sides of the torepart of the last and all of said gages cooperating to locate the last in predetermined position longitudinally, laterally and angularly relatively to said support both in the general plane of the bottom of the last and also in a direction transversely to said plane, a clamp engaging the curved surface of the forepart of ti e last, means for actuating the clamp to hold the last securely in the position determined by said gages, three drills located in predetermined relation to said gages and to eacl other, and means for actuating said drills to form said positioning holes in 1nedetermined relation to the edge contour of the last and at a predetermined angle to the general plane of the bottom of the last, including means for determining the depth ofall three holes measured from the plane determined by the bottom engaging surfaces of said gages. l

o. A work positioning device having, in combination, an end gage, two pairs of pivoted side gages, means including a pair of wedge blocks and a spring acting upon the two pairs of gages to cause said gages yieldingly to engage work, presented thereto, at substantially different distances from the end gage for determining the position of the work longitudinally, laterally and angularly in a plane, and means for adjusting independently the initial position of each pair of gages.

(3. A work positioning device lntving, in combinaticintwo pairs of pivoted side gages, a pair oil slide blocks, cam members thereon for moving the respective pairs of gages, and means yieldingly connecting said blocks to equalize the pressure of the gages against the work.

7. A worlt positioning device having, in

combination, a plurality of yielding arranged to engage the bottom and the side means for pressing the gages the edges of a last at sc arated points longiwork, a ch'u 1p for securing the work in t e tudinally thereof to determine the position position determined by the gages, means for of the last in all directions, means for clamploclzing the movable gages in work engaging ing the last in the position thus determined, position, and actuating meal 1 constructed a pluialit drills, a movable bushing conthe gene locaand arranged to operate tr e work clamping ing means and then means.

8. A worl: clampin mechanism having, in combination, a work engaging member, a sell-loo l innscrew and nut through which said member may be moved toward and from the work, and devices relatively rotating said screw and nut n opposite directions including two actuating levers and separate connections therefrom to a common connecting member.

9. in a mach e for operating on las s, the ination or a frame, tool supported by the frame, work support movable relatively to the frame to render the tool readily accessible, work positionii devices mounted on said support, actuating crevices ther mounted on the frame, operative connectiwis l etween said actuating; devices and said posit ming devices, and a removable member torming part or such connections by the removal 51 which said connections broken and thus rendered inoperative to permit movementof said work support relatively to said frame.

10. In a machine for operating on lasts, tlie combination of a toe age and two pairs tances from the toe gage constructed and arranged to engage the bottom and the side of a last, to locate the last and deterthe of side ga es at substantially different displane of the last bottom, a plurality iart o epth O' :7 nui n c usii AL: i n JLUJJ is; ill A holes and pressing 1. Ina i 3 on lasts, the combination or plurality of to the bo n and the side edges ot a l i? to deter c its position 121 all direcring the last in the DOSltlOH thus determined, and bushing inserting tools constructed ant arranged to support a plurality of bushings and being mova le in lines substantially normal the general plane of the bottom of the last to force the bushings to the bottoms of holes a ready formed in the bottom of the last.

12. En a machine for forming"position ng holes in the bottoms of lasts, the combination of a plurality of gages constructed and one, a clam-1 for sec nile maintained in such retion, may be moved together to a position ose to the bottom of the last and by which is drills may then be moved further to form holes in the bottom of the last.

13. In a machine for forming positioning holes in the bottoms of lasts, the combina tion of a last supporthaving a guideway, gaging devices for determining the position of a last in all directions relatively to said support and to said guideway, a drill, a movable bushing constituting a lateral guide for the drill and normally engaging it close to its operati g end, means for maintaining said drill, bushing and guideway in alinement, yielding means tending to move the bu i log azri along the drill, and means by which the drill and bushing may be movel together first to ard the last and thereafter independently for a predetermined distance to form a hole of predetermined depth in the last.

1%. ln machine for forming holes in the bottoms of lasts, the combination oI a last suppprt haying a guideway, gaging devices for determining the position of a last relatively '0 said guideway, a drill, a movcable onstituting a lateral guide for the normally engaging it. close to its end, means by which the drill and bushing together may be moved to a position close to tle bottom oi the last with the bushing in said guideway, and means for positively limiting the movement of the dull with relation to and beyond the plane of the bottom of the 15. In a machine for forming holes in the bottoms lasts, the combi ation of a last support having a plurality guideways, a lity of drills, a movable bushing con iiting a l teral guide for each drill, neans for maintaining the respective drills, oushings and guidewa a in aiinemen and means by which the di i and the bushings may be moved longituc ially into and out of the guidcways.

16. In machine for forming holes in the bottoms of lasts, the combination of last operatin bottoms of lasts, the combination of last positioning means, a plurality of sets of tools comprising a set of drills and a set of bushing inserting tools, a holder for the set of drills and a holder for the set of inserting tools, said holders being readily removable with their respective tools from the machine to provide for the substitution of holders in which the tools have a different spacing relatively to each other, and actuating devices for said tools constructed and arranged to maintain their connection with said tools for all of such different spacings thereof.

18. In a machine for forming holes in the bottoms of lasts, the combination of a last support having a plurality of guideways, a

movable into and out of alinement with said guideways, means for rotating said drills at high speed, means by which said drills may be moved through said guideways to form simultaneously a plurality of holes in the bottom of a last, and means by which said drills may be located positively in alinement with said guideways and in predetermined relation to the contour of the last as positioned by said gages.

In testimony whereof I have signed my name to this specification.

ARTHUR F. PYM. 

